Steffan Griffiths is a familiar face to viewers of S4C - especially those who have an interest in the weather.

Now Steffan has taken his expertise in forecasting whether we’ll be faced with wind, rain or sun to new heights with a special programme on S4C - Newid Hinsawdd, Newid Byd (Climate Change, Changing World).

Steffan will be joined by Daf Wyn, presenter on Heno and Prynhawn Da. The two have already been on two journeys together for the programmes Everest Steff a Daf (2016) and Crwydro Clwyd (2018).

Newid Hinsawdd, Newid Byd, which is being broadcast on Sunday at 9pm, is looking back at the extreme weather we experienced in 2018 and the reason why Wales and the world finds itself in the climactic conditions it is enduring at the moment.

“We look at the ‘Beast from the East’, the dry summer and the floods we experienced last year and ask if they are linked to global warming and also if there is more of this kind of weather on the way,” said Steffan, from Peniel, near Carmarthen who, as well as presenting the weather is a postgraduate in glaciology.

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“This is a very different programme to our other two,” said Steffan. “We talk to people who have been affected by the extreme weather as well as experts in the field including Dr Arwyn Edwards who has been studying weather patterns in the Arctic for 12 years.

“We go over to ETH Zurich University to talk to Dr Huw Cathan Davies - a Welsh-speaker originally from Ammanford - who is one of the world’s leading experts on climate change.”

So, is there hope for our planet for the future? Well, it’s not all bad news and during the programme Steff and Daf visit IBERS (Institute of Biological, Environmental and Rural Sciences) at Aberystwyth University to see what is being done in Wales to stop the environmental problems we are facing as a country.

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“They are doing research into developing crops which can withstand extreme temperatures or floods,”explained Steffan. “There are plans to look at how we can use water from old coal mines in South Wales as a source of geothermol heat in order to heat houses and produce green energy.”

Steffan describes Newid Hinsawdd, Newid Byd as a rollercoaster ride. “The planet is in a very vulnerable state, and we must all do our part as a matter of urgency. We hope that the programme will throw some light on the subject,” he said.